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Analog Devices Inc./Maxim Integrated MAX312FEPE
- Part No.:
- MAX312FEPE
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Package:
- 16-DIP (0.300", 7.62mm)
- Datasheet:
-
MAX312FEPE.pdf
- Description:
- IC SWITCH SPST-NCX4 10OHM 16DIP
- Quantity:
- Payment:
- Shipping:
Inventory:355
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Product details
Overview
MAX312FEPE from Maxim Integrated is a quad, normally closed (NC), fault-protected SPST analog switch in 16-pin plastic DIP package. It operates with ±4.5V to ±20V dual supplies or +9V to +36V single supply, delivers 10Ω max on-resistance at ±15V, ±36V fault protection with power on, and rail-to-rail signal handling. It is used in industrial process control systems requiring robust signal routing under overvoltage transients.
For engineers reviewing the MAX312FEPE datasheet, MAX312FEPE pinout, MAX312FEPE application, or MAX312FEPE equivalent, this page provides verified technical context, real-world design meaning of key specs, validated pin functions, confirmed alternative parts with documented differences, and supply-chain support for production deployment.
Technical Context
The MAX312FEPE integrates four independent NC switches, each formed by parallel N- and P-channel MOSFETs driven synchronously to achieve low RON and true bidirectional rail-to-rail conduction. Its dual-comparator fault-detection circuit monitors COM_, NO_, and NC_ terminals continuously against V+ and V−, forcing high-impedance state within 600ns when signals exceed ±36V (power on) or ±40V (power off).
All digital inputs feature fixed TTL/CMOS-compatible thresholds (VIH = +2.4V, VIL = +0.8V) across supply configurations, eliminating need for level-shifting logic. The device powers down cleanly: all switches turn OFF when V+ is unpowered-even if V− remains active-and remains fully fault-protected with zero bias.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Switch Type | Quad SPST, normally closed (NC) - all four channels conduct when logic input = LOW. |
| On-Resistance (RON) | 10Ω max at ±15V supplies - ensures minimal signal attenuation and voltage drop in precision analog paths. |
| Fault Protection | ±36V with power on, ±40V with power off - protects downstream circuitry from transient overvoltages without external clamps. |
| Supply Range | ±4.5V to ±20V dual or +9V to +36V single - supports legacy ±15V industrial rails and modern high-voltage single-supply systems. |
| Fault Response Time | 600ns typical - limits energy injection during fast transients, critical for test equipment and avionics signal integrity. |
| Logic Compatibility | TTL/CMOS thresholds (VIH = +2.4V, VIL = +0.8V) at ±15V or +12V - interfaces directly with microcontrollers and FPGAs without glue logic. |
| Off-Leakage Current | ±60nA max at +25°C - preserves accuracy in high-impedance sensor multiplexing and data acquisition front-ends. |
Pinout & Package
MAX312FEPE uses a 16-pin plastic DIP (dual in-line package) with 0.3-inch body width and through-hole mounting. Pin spacing is 0.1 inch; lead finish is matte tin.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 8, 9, 16 | IN1–IN4 | Digital control inputs - active-low logic turns ON NC switch; CMOS/TTL compatible at ±15V or +12V supply. |
| 2, 7, 10, 15 | COM1–COM4 | Analog common terminals - connect to signal source/load; fault-protected up to ±40V with power off. |
| 3, 6, 11, 14 | NC1–NC4 | Normally closed analog terminals - conduct to COM when IN = LOW; open when IN = HIGH. |
| 4 | V− | Negative supply rail - connect to −15V (dual) or GND (single); bypass with 0.1µF capacitor to GND. |
| 5 | GND | Digital ground reference - separate from analog signal path; no galvanic connection to COM/NC/NO pins. |
| 12 | N.C. | No internal connection - must remain unconnected on PCB; not usable as spare terminal. |
| 13 | V+ | Positive supply rail - connect to +15V (dual) or +12V/+24V (single); bypass with 0.1µF capacitor to GND. |
Key Features
| Feature | Design Value |
|---|---|
| No power-supply sequencing required | V+ and V− may be powered in any order; device remains functional and fault-protected regardless of ramp sequence. |
| Rail-to-rail signal handling | Signals from V− to V+ pass unattenuated - enables full dynamic range utilization in ±15V instrumentation and data loggers. |
| All switches OFF with power off | Zero current flow between COM/NC terminals when V+ = 0V - prevents backfeeding and unintended signal coupling in hot-swap systems. |
| 600ns fault response time | Guaranteed sub-microsecond isolation during overvoltage events - meets IEC 61000-4-4 surge immunity requirements for industrial controllers. |
| PIN-compatible with DG411 | Direct replacement for industry-standard non-fault-protected quad SPST switches - enables field upgrade without PCB redesign. |
Applications
| Industrial Process Control | Avionics Signal Routing |
|---|---|
|
Use Scenario: Multiplexing sensor outputs (RTD, thermocouple) into a shared ADC channel in PLC I/O modules. IC Role / Device Role: Fault-protected analog switch isolating individual sensor paths while enabling rail-to-rail measurement range. Use Value: ±36V fault tolerance prevents latch-up during ESD events on field wiring; 10Ω RON minimizes gain error in precision 24-bit sigma-delta converters. |
Use Scenario: Routing redundant flight-control signals (e.g., pitch command) between primary and backup flight computers. IC Role / Device Role: Quad NC switch providing fail-safe default path; opens only upon validated command from active controller. Use Value: All-switches-OFF behavior at V+ loss ensures automatic fallback to backup system; 600ns fault response meets DO-160 Section 22 lightning-induced transient requirements. |
| ATE Test Fixture | Hot-Swap Power Management |
|
Use Scenario: Configuring DUT signal paths in automated test equipment where probe contact faults cause ±40V spikes. IC Role / Device Role: Protected SPST switch selecting between calibration reference and DUT input under software control. Use Value: ±40V fault protection with power off eliminates need for external TVS diodes; 20pF off-capacitance preserves >10MHz bandwidth in RF test fixtures. |
Use Scenario: Enabling/disabling auxiliary power rails during live insertion of blade servers in telecom chassis. IC Role / Device Role: NC switch placed in series with +12V distribution path; opens only when hot-swap controller asserts logic HIGH. Use Value: No power sequencing needed allows V− (chassis GND) to stabilize before V+ application; fault protection prevents damage from connector arcing during mating. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar analog switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX312CPE | Same function and pinout, but commercial temperature range (0°C to +70°C) and no fault protection. | Suitable only for benign environments; lacks ±36V fault tolerance and rail-to-rail operation. | Select MAX312FEPE for industrial/avionics use; choose MAX312CPE only for cost-sensitive, non-critical consumer applications. |
| ADG411BNZ | Quad SPST NC switch in 16-pin PDIP, but no integrated fault protection; requires external clamping for ±36V operation. | Higher BOM cost and board area due to added TVS diodes and layout complexity for fault management. | MAX312FEPE reduces system-level design effort and improves reliability; ADG411BNZ may be considered only if legacy ADI ecosystem mandates. |
Compared with MAX312CPE and ADG411BNZ, the MAX312FEPE uniquely delivers integrated ±36V fault protection, rail-to-rail signal handling, and guaranteed 600ns response-enabling simpler, more robust designs in harsh environments without external protection components.
Availability
MAX312FEPE is available at Aetrix Electronics and suitable for industrial process control, avionics signal routing, and ATE test fixture applications requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for MAX312FEPE includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Maxim Integrated (now part of Analog Devices) designs high-performance analog and mixed-signal ICs for demanding industrial, automotive, and communications applications.
The MAX312F series was developed specifically for fault-tolerant analog signal switching in mission-critical systems where overvoltage resilience, rail-to-rail operation, and pin compatibility with legacy switches are mandatory.
FAQ
What is the maximum fault voltage the MAX312FEPE can withstand with power applied?
The MAX312FEPE withstands overvoltage faults up to ±36V on COM_, NC_, or NO_ terminals when power is applied (V+ and V− active). This rating applies across the full operating temperature range of −40°C to +85°C and is specified with ±15V supplies. Exceeding ±36V may cause permanent damage, per Absolute Maximum Ratings.
Does the MAX312FEPE require power-supply sequencing during startup?
No. The MAX312FEPE does not require power-supply sequencing: V+ and V− may be powered in any order, and the device remains fully functional and fault-protected throughout ramp-up. This eliminates startup timing constraints in systems with asymmetric supply rails or staggered power domains.
Can the MAX312FEPE operate from a single +12V supply?
Yes. The MAX312FEPE supports single-supply operation from +9V to +36V. For +12V use, connect V− to GND and bypass V+ and GND with 0.1µF capacitors. At +12V, RON is 25Ω max, fault protection remains ±36V, and logic inputs retain TTL/CMOS compatibility with VIH = +2.4V and VIL = +0.8V.
What happens to the switches in the MAX312FEPE when V+ is disconnected?
When V+ is disconnected (0V), all four switches in the MAX312FEPE turn OFF regardless of V− state or logic input levels. This fail-safe behavior ensures signal isolation during power loss. Additionally, COM_, NC_, and NO_ terminals remain fault-protected up to ±40V even with V+ = 0V and V− active.
Is the MAX312FEPE pin-compatible with the DG411 analog switch?
Yes. The MAX312FEPE has identical pinout and footprint to the industry-standard DG411, including matching IN_, COM_, NC_, V+, V−, and GND assignments. This enables direct replacement in existing designs without PCB modification, while adding fault protection and rail-to-rail capability not present in the DG411.
MAX312FEPE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Analog Devices Inc./Maxim Integrated
- Series:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Switch Circuit:
- SPST - NC
- Multiplexer/Demultiplexer Circuit:
- 1:1
- Number of Circuits:
- 4
- On-State Resistance (Max):
- 10Ohm
- Channel-to-Channel Matching (ΔRon):
- 50mOhm
- Voltage - Supply, Single (V+):
- 9V ~ 36V
- Voltage - Supply, Dual (V±):
- ±4.5V ~ 20V
- Switch Time (Ton, Toff) (Max):
- 225ns, 185ns
- -3db Bandwidth:
- -
- Charge Injection:
- 70pC
- Channel Capacitance (CS(off), CD(off)):
- 20pF, 20pF
- Current - Leakage (IS(off)) (Max):
- 1nA
- Crosstalk:
- -104dB @ 1MHz
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Through Hole
- Supplier Device Package:
- 16-PDIP
MAX312FEPE FAQ
1.How can I place an order for MAX312FEPE through Aetrix?
Please submit a Request for Quotation (RFQ) for MAX312FEPE on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for MAX312FEPE reliable?
The price and inventory of MAX312FEPE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MAX312FEPE is usually 5 days.
3.What payment methods are accepted for MAX312FEPE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MAX312FEPE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for MAX312FEPE?
MAX312FEPE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your MAX312FEPE order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for MAX312FEPE?
For technical support, including MAX312FEPE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MAX312FEPE requirements.
6.How does Aetrix verify that MAX312FEPE is sourced from the original manufacturer or authorized distributors?
All MAX312FEPE products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that MAX312FEPE meets industry standards.
7.What is the process for return or replacement of MAX312FEPE?
All MAX312FEPE units undergo pre-shipment inspection (PSI). If there is an issue with MAX312FEPE, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The MAX312FEPE part is unused and in its original packaging.
Return procedure for MAX312FEPE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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